All of your worries can now dissapear. I have been driving hard, soft, sweet, sour and every other way you can drive a car testing the intake. All stall problems are gone, I was even had a near stall in idle with the UDP and thats gone! The hesitation is 99.9% gone. With the K&N we though it was sweet, it definietly kills the stock box but the intake is a 1000 x's better. With the stock box/K&N I would notice huge hesitations sometimes. It would be like the car would take a deep breath when I hit the pedal and never let go of it. Only once have I noticed the car take a "breath" with the intake but it let it go almost instantly and nailed me into my seat, it was actually kind cool. I love my Injen intake and I know all of you will too.
Another example, I used to take turns, down shift into second before the turn and the hit the gas on the way out and it would lag building up speed, tonight on the way home I took the same turn, hit the gas on the way out and it was like the hand of god slapped my car on the ass. A huge difference...